EP 2700189 A4 20150318 - IDENTITY-BASED DECRYPTION
Title (en)
IDENTITY-BASED DECRYPTION
Title (de)
ENTSCHLÜSSELUNG AUF IDENTITÄTSBASIS
Title (fr)
DÉCRYPTAGE BASÉ SUR L'IDENTITÉ
Publication
Application
Priority
CA 2011050181 W 20110401
Abstract (en)
[origin: US2012254616A1] Devices and methods are provided for managing identity-based decryption of digital content. A message sender (Alice) uses a random key (Krand) to encrypt message content for a message recipient (Bob). Then Alice uses the public key of a message decryption service provider (Carmen) to generate a wrapped key ciphertext comprising the Krand and authentication information associated with Bob. Alice then sends a message text containing the encrypted message content and the wrapped key ciphertext to Bob, who in turn sends the wrapped key ciphertext to Carmen along with his authentication information. Carmen then uses her private key to process the wrapped key ciphertext to decrypt the Krand and Bob's authentication information. If the authentication information provided by Bob matches the decrypted authentication information, then Carmen sends the decrypted Krand to Bob, who uses it to decrypt the encrypted message content.
IPC 8 full level
H04L 9/08 (2006.01); H04L 29/06 (2006.01); H04L 9/30 (2006.01)
CPC (source: EP US)
H04L 9/0825 (2013.01 - EP US); H04L 63/061 (2013.01 - EP US); H04L 63/0823 (2013.01 - EP US); H04L 9/3073 (2013.01 - EP US); H04L 2209/76 (2013.01 - EP US); H04L 2463/062 (2013.01 - EP US)
Citation (search report)
- [A] US 2005071632 A1 20050331 - PAUKER MATTHEW J [US], et al
- [A] US 2009034714 A9 20090205 - BONEH DAN [US], et al
- [X] HIMANSHU KHURANA ET AL: "On the Risks of IBE", 1 November 2006 (2006-11-01), XP055128790, Retrieved from the Internet <URL:http://www.ncsa.illinois.edu/People/hkhurana/IWAP06.pdf> [retrieved on 20140714]
- See references of WO 2012129640A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2012254616 A1 20121004; US 9490974 B2 20161108; CA 2795287 A1 20121004; CA 2795287 C 20180227; EP 2700189 A2 20140226; EP 2700189 A4 20150318; EP 2700189 B1 20200122; WO 2012129640 A2 20121004; WO 2012129640 A3 20121206
DOCDB simple family (application)
US 201213433747 A 20120329; CA 2011050181 W 20110401; CA 2795287 A 20110401; EP 11861897 A 20110401